priority1c
Electrical
- May 9, 2006
- 2
I am in a little argument over rubber keypad repair with an unreasonable person. I am looking for other opinions.
We currently repair a certain keypad that was manufactured with an obvious problem. The rubber pills are 3mm diameter and the circuit board contacts are a star inside a circle that is 6mm diameter so the conductive pill barely touches the outer ring. Picture
Any amount of oil or build-up will effect the buttons almost immediately and quickly make them impossible to use. As we know, most rubber keypads secrete oil (Source)
We use a membrane insert between the original rubber keypad and the circuit board. Our membrane has 7mm conductive contact area, blocks the oil the keypad produces and prevents the carbon pill from breaking down leaving the black residue behind.
From looking through keypad manufacturer's web sites, this seems to be the preferred method or at least an improvement over a rubber keypad alone.
Any other opinions out there?
Can anyone think of potential problems with this method? We have tested this extensively with countless machine controlled keypresses and even froze and heated the repair several times but it is nice to get input from others.
Thank You
We currently repair a certain keypad that was manufactured with an obvious problem. The rubber pills are 3mm diameter and the circuit board contacts are a star inside a circle that is 6mm diameter so the conductive pill barely touches the outer ring. Picture
Any amount of oil or build-up will effect the buttons almost immediately and quickly make them impossible to use. As we know, most rubber keypads secrete oil (Source)
We use a membrane insert between the original rubber keypad and the circuit board. Our membrane has 7mm conductive contact area, blocks the oil the keypad produces and prevents the carbon pill from breaking down leaving the black residue behind.
From looking through keypad manufacturer's web sites, this seems to be the preferred method or at least an improvement over a rubber keypad alone.
Any other opinions out there?
Can anyone think of potential problems with this method? We have tested this extensively with countless machine controlled keypresses and even froze and heated the repair several times but it is nice to get input from others.
Thank You